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[2001:1c00:c32:7800:5bfa:a036:83f0:f9ec]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a780a6dfa84sm146172166b.63.2024.07.10.02.59.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 10 Jul 2024 02:59:49 -0700 (PDT) Message-ID: <3fece177-f6b4-41e4-a781-7c4c923ff7d9@redhat.com> Date: Wed, 10 Jul 2024 11:59:48 +0200 Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH AUTOSEL 6.1 23/29] Input: silead - Always support 10 fingers To: Pavel Machek , Sasha Levin Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, Dmitry Torokhov , linux-input@vger.kernel.org, platform-driver-x86@vger.kernel.org References: <20240618124018.3303162-1-sashal@kernel.org> <20240618124018.3303162-23-sashal@kernel.org> Content-Language: en-US, nl From: Hans de Goede In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Pavel, On 7/10/24 11:58 AM, Pavel Machek wrote: > Hi! > >> From: Hans de Goede >> >> [ Upstream commit 38a38f5a36da9820680d413972cb733349400532 ] >> >> When support for Silead touchscreens was orginal added some touchscreens >> with older firmware versions only supported 5 fingers and this was made >> the default requiring the setting of a "silead,max-fingers=10" uint32 >> device-property for all touchscreen models which do support 10 fingers. >> >> There are very few models with the old 5 finger fw, so in practice the >> setting of the "silead,max-fingers=10" is boilerplate which needs to >> be copy and pasted to every touchscreen config. >> >> Reporting that 10 fingers are supported on devices which only support >> 5 fingers doesn't cause any problems for userspace in practice, since >> at max 4 finger gestures are supported anyways. Drop the max_fingers >> configuration and simply always assume 10 fingers. > > This does not fix a serious bug, should not be in stable. This patch is necessary for clean backporting of new DMI quirks added to drivers/platform/x86/touchscreen_dmi.c, so IMHO it does make sense as a stable series patch. Regards, Hans